>>112816360He's a "real teenager" who found himself send to comics and get the chance to be a superhero kinda like Kingdom Hearts
The difference is that he soon realize that he was never real and start to suffer from problems like identity crisis, he realize that he will never grow old or die because he's a comic character and to make things worse his world is destroyed, he then desperately try to rebuild his world and return to his normal life at any cost, not caring about how many people he must kill since they are "fictional characters", he also develop the belief that nothing he ever do is his fault since the writers are the ones who control his fate.
Prime is a satire of those self insert wish fullfilment stories about kids being send to their favorite universes and meeting their heroes.